81630107274 has 32 divisors (see below), whose sum is σ = 164049960960. Its totient is φ = 27078560432.

The previous prime is 81630107267. The next prime is 81630107297. The reversal of 81630107274 is 47270103618.

It is a super-2 number, since 2×81630107274² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2286727 + ... + 2322149.

It is an arithmetic number, because the mean of its divisors is an integer number (5126561280).

Almost surely, 2^81630107274 is an apocalyptic number.

81630107274 is an abundant number, since it is smaller than the sum of its proper divisors (82419853686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81630107274 is a wasteful number, since it uses less digits than its factorization.

81630107274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37274.

The product of its (nonzero) digits is 56448, while the sum is 39.

The spelling of 81630107274 in words is "eighty-one billion, six hundred thirty million, one hundred seven thousand, two hundred seventy-four".